1 /* $NetBSD: param.h,v 1.6 1995/03/18 07:24:01 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Modified for VAX 940213/Ragge 8 * 9 * This code is derived from software contributed to Berkeley by 10 * William Jolitz. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.h 5.8 (Berkeley) 6/28/91 41 */ 42 43 #ifndef _VAX_PARAM_H_ 44 #define _VAX_PARAM_H_ 45 46 #include "machine/macros.h" 47 #include "psl.h" 48 49 /* 50 * Machine dependent constants for VAX. 51 */ 52 53 #define MACHINE "vax" 54 #define MID_MACHINE MID_VAX 55 #define UNIX "vmunix" 56 57 /* 58 * Round p (pointer or byte index) up to a correctly-aligned value 59 * for all data types (int, long, ...). The result is u_int and 60 * must be cast to any desired pointer type. 61 */ 62 63 #define ALIGNBYTES (sizeof(int) - 1) 64 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 65 66 #define PGSHIFT 9 /* LOG2(NBPG) */ 67 #define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 68 #define PGOFSET (NBPG-1) /* byte offset into page */ 69 #define NPTEPG (NBPG/(sizeof (struct pte))) 70 71 #define KERNBASE 0x80000000 /* start of kernel virtual */ 72 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 73 74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 75 #define DEV_BSIZE (1 << DEV_BSHIFT) 76 77 #define BLKDEV_IOSIZE 2048 78 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 79 80 #define CLSIZELOG2 1 81 #define CLSIZE 2 82 83 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 84 #define SSIZE 4 /* initial stack size/NBPG */ 85 #define SINCR 4 /* increment of stack/NBPG */ 86 87 #define UPAGES 16 /* pages of u-area */ 88 #define USPACE (NBPG*UPAGES) 89 90 /* 91 * Constants related to network buffer management. 92 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 93 * on machines that exchange pages of input or output buffers with mbuf 94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 95 * of the hardware page size. 96 */ 97 98 #ifndef MSIZE 99 #define MSIZE 128 /* size of an mbuf */ 100 #endif /* MSIZE */ 101 102 #ifndef MCLSHIFT 103 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 104 #endif /* MCLSHIFT */ 105 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 106 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 107 108 #ifndef NMBCLUSTERS 109 #ifdef GATEWAY 110 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 111 #else 112 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 113 #endif /* GATEWAY */ 114 #endif /* NMBCLUSTERS */ 115 116 /* 117 * Size of kernel malloc arena in CLBYTES-sized logical pages 118 */ 119 120 #ifndef NKMEMCLUSTERS 121 #define NKMEMCLUSTERS (512*1024/CLBYTES) 122 #endif 123 124 /* 125 * Some macros for units conversion 126 */ 127 128 /* Core clicks (512 bytes) to segments and vice versa */ 129 130 #define ctos(x) (x) 131 #define stoc(x) (x) 132 133 /* Core clicks (512 bytes) to disk blocks */ 134 135 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 136 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 137 #define dtob(x) ((x)<<DEV_BSHIFT) 138 139 /* clicks to bytes */ 140 141 #define ctob(x) ((x)<<PGSHIFT) 142 143 /* bytes to clicks */ 144 145 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 146 147 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 148 ((bytes) >> DEV_BSHIFT) 149 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 150 ((db) << DEV_BSHIFT) 151 152 /* 153 * Map a ``block device block'' to a file system block. 154 * This should be device dependent, and will be if we 155 * add an entry to cdevsw/bdevsw for that purpose. 156 * For now though just use DEV_BSIZE. 157 */ 158 159 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 160 161 /* 162 * Mach derived conversion macros 163 */ 164 165 #define vax_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1)) 166 #define vax_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1)) 167 #define vax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 168 #define vax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 169 #define vax_btod(x) ((unsigned)(x) >> PDRSHIFT) 170 #define vax_dtob(x) ((unsigned)(x) << PDRSHIFT) 171 #define vax_btop(x) ((unsigned)(x) >> PGSHIFT) 172 #define vax_ptob(x) ((unsigned)(x) << PGSHIFT) 173 174 #define splx(reg) \ 175 ({ \ 176 register int val; \ 177 asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 178 : "=g" (val) \ 179 : "g" (reg)); \ 180 val; \ 181 }) 182 183 184 #define spl0() splx(0) /* IPL0 */ 185 #define splsoftclock() splx(8) /* IPL08 */ 186 #define splnet() splx(0xc) /* IPL0C */ 187 #define spl4() splx(0x14) /* IPL14 */ 188 #define spltty() splx(0x15) /* IPL15 */ 189 #define splbio() splx(0x15) /* IPL15 */ 190 #define splimp() splx(0x16) /* IPL16 */ 191 #define splclock() splx(0x18) /* IPL18 */ 192 #define splhigh() splx(0x1f) /* IPL1F */ 193 #define splstatclock() splclock() 194 195 #define ovbcopy(x,y,z) bcopy(x,y,z) /* This should work i hope... */ 196 197 #define vmapbuf(p,q) 198 #define vunmapbuf(p,q) 199 200 #endif /* _VAX_PARAM_H_ */ 201